class Goods;//Supermarket-Goods.h

class Supermarket
{
private:
    Goods *pGoods[20];
public:
    Supermarket();
    void Sale();
    void Append();
    void Delete();
    void Query();
};

class Goods
{
private:
    double Price;
    char Name[10];
    int number;
public:
    friend Supermarket;
    void Add();
    void Showme();
};
